Year	% of cohort
1960	33.93555364734328
1961	36.55830975355288
1962	40.41510398273785
1963	41.10937465797593
1964	41.97273456819411
1965	41.425549264595574
1966	42.623381367933945
1967	43.315401598981175
1968	44.30041915398647
1969	44.88489008876315
1970	45.483389633418795
1971	45.44010876045846
1972	47.34035455596338
1973	48.37268754079557
1974	49.05388017334641
1975	49.86557719482216
1976	50.63763842036177
1977	51.3023246732442
1978	51.85751431607024
1979	52.49428952214189
1980	53.05042565760078
1981	53.66550901205486
1982	54.30686102178304
1983	54.851342015055266
1984	55.46017150229496
1985	56.16703080642762
1986	57.03454226888838
1987	57.538464654514385
1988	57.846821685442116
1989	58.43026493936759
1990	58.65904595389998
1991	59.025477411371774
1992	59.4090158855105
1993	59.57557442126221
1994	59.982536647998735
1995	60.34887093228113
1996	60.84603853978878
1997	61.43503354524373
1998	61.88545883632379
1999	62.36382826431278
2000	62.79696988978637
2001	63.24392518490387
2002	63.72924389614102
2003	64.11639823521901
2004	64.51609836108506
2005	65.12764206083743
2006	65.75207312612466
2007	66.13578025108065
2008	66.36733442908272
2009	66.95429567066147
2010	67.36297023112697
2011	67.87257987451898
2012	68.28922799257714
2013	68.73275637284779
2014	69.31197513356095
2015	69.7631409016032
2016	70.15778886053624
2017	70.45506612096615
2018	70.92881580807399
2019	71.23356643808903
2020	69.47948532836477
2021	67.07433077276113
2022	68.466256147662